Amir Khan knocks out 6 robbers

Before the car of ex light category champ Amir Khan stopped another one and produced 6 mean looking airheads, who had no clue what's in store for them. One was armed, probably with knife, but the report doesn't tell.
Amir and his brother stepped out to face them. One wanted his carkeys, but he refused and the robber attacked. He got KTFOed and the others rushed to his help. The police found them all red and blue on t3h pavement and the attackers turned victims will probably puke their way through the week. What is interesting is, that raport says nobody was arrested.